From 71f699ccda5608ddc8f3e65fe26fb351c2adccf7 Mon Sep 17 00:00:00 2001
From: Jonathan Johnson <jon@khonsulabs.com>
Date: Wed, 11 Sep 2024 16:29:04 -0700
Subject: [PATCH] WindowHandle::execute

---
 CHANGELOG.md  |   3 +
 Cargo.lock    | 160 +++++++++++++++++++++++++-------------------------
 src/window.rs |  78 +++++++++++++++++++++++-
 3 files changed, 159 insertions(+), 82 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index d3ee39f..3c8ccec 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -135,6 +135,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   constant that resolves to the primary shortcut modifier on the target
   platform.
 - New feature flag `serde` enables serialization support for some types.
+- `WindowHandle::execute` executes a function on the window's thread providing
+  access to an `EventContext`. This can be used to gain access to the window
+  directly, including getting a reference to the underlying winit Window.
 
 
 [139]: https://github.com/khonsulabs/cushy/issues/139
diff --git a/Cargo.lock b/Cargo.lock
index 3b7bc02..c6229ac 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -20,9 +20,9 @@ checksum = "c71b1793ee61086797f5c80b6efa2b8ffa6d5dd703f118545808a7f2e27f7046"
 
 [[package]]
 name = "addr2line"
-version = "0.22.0"
+version = "0.24.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6e4503c46a5c0c7844e948c9a4d6acd9f50cccb4de1c48eb9e291ea17470c678"
+checksum = "f5fb1d8e4442bd405fdfd1dacb42792696b0cf9cb15882e5d097b742a676d375"
 dependencies = [
  "gimli",
 ]
@@ -117,14 +117,14 @@ dependencies = [
 
 [[package]]
 name = "anyhow"
-version = "1.0.86"
+version = "1.0.88"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b3d1d046238990b9cf5bcde22a3fb3584ee5cf65fb2765f454ed428c7a0063da"
+checksum = "4e1496f8fb1fbf272686b8d37f523dab3e4a7443300055e74cdaa449f3114356"
 
 [[package]]
 name = "appit"
 version = "0.3.2"
-source = "git+https://github.com/khonsulabs/appit#6c59e6942fdeecf8405f0b0ee1098aeb4bef9e60"
+source = "git+https://github.com/khonsulabs/appit#93479b81112dfeef2b1646c5050c9fbd305c3288"
 dependencies = [
  "winit",
 ]
@@ -170,7 +170,7 @@ checksum = "0ae92a5119aa49cdbcf6b9f893fe4e1d98b04ccbf82ee0584ad948a44a734dea"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.76",
+ "syn 2.0.77",
 ]
 
 [[package]]
@@ -217,7 +217,7 @@ dependencies = [
  "manyhow",
  "proc-macro2",
  "quote",
- "syn 2.0.76",
+ "syn 2.0.77",
 ]
 
 [[package]]
@@ -233,7 +233,7 @@ dependencies = [
  "proc-macro2",
  "quote",
  "quote-use",
- "syn 2.0.76",
+ "syn 2.0.77",
 ]
 
 [[package]]
@@ -267,17 +267,17 @@ dependencies = [
 
 [[package]]
 name = "backtrace"
-version = "0.3.73"
+version = "0.3.74"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5cc23269a4f8976d0a4d2e7109211a419fe30e8d88d677cd60b6bc79c5732e0a"
+checksum = "8d82cb332cdfaed17ae235a638438ac4d4839913cc2af585c3c6746e8f8bee1a"
 dependencies = [
  "addr2line",
- "cc",
  "cfg-if",
  "libc",
- "miniz_oxide 0.7.4",
+ "miniz_oxide 0.8.0",
  "object",
  "rustc-demangle",
+ "windows-targets 0.52.6",
 ]
 
 [[package]]
@@ -354,9 +354,9 @@ checksum = "64fa3c856b712db6612c019f14756e64e4bcea13337a6b33b696333a9eaa2d06"
 
 [[package]]
 name = "bytemuck"
-version = "1.17.1"
+version = "1.18.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "773d90827bc3feecfb67fab12e24de0749aad83c74b9504ecde46237b5cd24e2"
+checksum = "94bbb0ad554ad961ddc5da507a12a29b14e4ae5bda06b19f575a3e6079d2e2ae"
 dependencies = [
  "bytemuck_derive",
 ]
@@ -369,7 +369,7 @@ checksum = "0cc8b54b395f2fcfbb3d90c47b01c7f444d94d05bdeb775811dec868ac3bbc26"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.76",
+ "syn 2.0.77",
 ]
 
 [[package]]
@@ -418,9 +418,9 @@ dependencies = [
 
 [[package]]
 name = "cc"
-version = "1.1.15"
+version = "1.1.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "57b6a275aa2903740dc87da01c62040406b8812552e97129a63ea8850a17c6e6"
+checksum = "b62ac837cdb5cb22e10a256099b4fc502b1dfe560cb282963a974d7abd80e476"
 dependencies = [
  "jobserver",
  "libc",
@@ -704,7 +704,7 @@ dependencies = [
  "proc-macro2",
  "quote",
  "quote-use",
- "syn 2.0.76",
+ "syn 2.0.77",
 ]
 
 [[package]]
@@ -726,7 +726,7 @@ checksum = "62d671cc41a825ebabc75757b62d3d168c577f9149b2d49ece1dad1f72119d25"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.76",
+ "syn 2.0.77",
 ]
 
 [[package]]
@@ -801,9 +801,9 @@ dependencies = [
 
 [[package]]
 name = "error-code"
-version = "3.2.0"
+version = "3.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a0474425d51df81997e2f90a21591180b38eccf27292d755f3e30750225c175b"
+checksum = "a5d9305ccc6942a704f4335694ecd3de2ea531b114ac2d51f5f843750787a92f"
 
 [[package]]
 name = "etagere"
@@ -944,7 +944,7 @@ checksum = "1a5c6c585bc94aaf2c7b51dd4c2ba22680844aba4c687be581871a6f518c5742"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.76",
+ "syn 2.0.77",
 ]
 
 [[package]]
@@ -986,9 +986,9 @@ dependencies = [
 
 [[package]]
 name = "gimli"
-version = "0.29.0"
+version = "0.31.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "40ecd4077b5ae9fd2e9e169b102c6c330d0605168eb0e8bf79952b256dbefffd"
+checksum = "32085ea23f3234fc7846555e85283ba4de91e21016dc0455a16286d87a292d64"
 
 [[package]]
 name = "gl_generator"
@@ -1175,9 +1175,9 @@ checksum = "44feda355f4159a7c757171a77de25daf6411e217b4cabd03bd6650690468126"
 
 [[package]]
 name = "indexmap"
-version = "2.4.0"
+version = "2.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "93ead53efc7ea8ed3cfb0c79fc8023fbb782a5432b52830b6518941cebe6505c"
+checksum = "68b900aa2f7301e21c36462b170ee99994de34dff39a4a6a528e80e7376d07e5"
 dependencies = [
  "equivalent",
  "hashbrown",
@@ -1185,9 +1185,9 @@ dependencies = [
 
 [[package]]
 name = "insta"
-version = "1.39.0"
+version = "1.40.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "810ae6042d48e2c9e9215043563a58a80b877bc863228a74cf10c49d4620a6f5"
+checksum = "6593a41c7a73841868772495db7dc1e8ecab43bb5c0b6da2059246c4b506ab60"
 dependencies = [
  "console",
  "lazy_static",
@@ -1215,7 +1215,7 @@ checksum = "c34819042dc3d3971c46c2190835914dfbe0c3c13f61449b2997f4e9722dfa60"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.76",
+ "syn 2.0.77",
 ]
 
 [[package]]
@@ -1311,7 +1311,7 @@ checksum = "e2db585e1d738fc771bf08a151420d3ed193d9d895a36df7f6f8a9456b911ddc"
 [[package]]
 name = "kludgine"
 version = "0.10.0"
-source = "git+https://github.com/khonsulabs/kludgine#7d2d0dae63ba14142cb5355f10cfff074659ae27"
+source = "git+https://github.com/khonsulabs/kludgine#04013453b631609cacb0edf79f08aa00715f7621"
 dependencies = [
  "ahash",
  "alot",
@@ -1483,7 +1483,7 @@ dependencies = [
  "manyhow-macros",
  "proc-macro2",
  "quote",
- "syn 2.0.76",
+ "syn 2.0.77",
 ]
 
 [[package]]
@@ -1686,7 +1686,7 @@ checksum = "ed3955f1a9c7c0c15e092f9c887db08b1fc683305fdf6eb6684f22555355e202"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.76",
+ "syn 2.0.77",
 ]
 
 [[package]]
@@ -1737,7 +1737,7 @@ dependencies = [
  "proc-macro-crate",
  "proc-macro2",
  "quote",
- "syn 2.0.76",
+ "syn 2.0.77",
 ]
 
 [[package]]
@@ -1954,9 +1954,9 @@ dependencies = [
 
 [[package]]
 name = "object"
-version = "0.36.3"
+version = "0.36.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "27b64972346851a39438c60b341ebc01bba47464ae329e55cf343eb93964efd9"
+checksum = "084f1a5821ac4c651660a94a7153d27ac9d8a53736203f58b31945ded098070a"
 dependencies = [
  "memchr",
 ]
@@ -2012,7 +2012,7 @@ dependencies = [
  "by_address",
  "proc-macro2",
  "quote",
- "syn 2.0.76",
+ "syn 2.0.77",
 ]
 
 [[package]]
@@ -2033,7 +2033,7 @@ checksum = "1e401f977ab385c9e4e3ab30627d6f26d00e2c73eef317493c4ec6d468726cf8"
 dependencies = [
  "cfg-if",
  "libc",
- "redox_syscall 0.5.3",
+ "redox_syscall 0.5.4",
  "smallvec",
  "windows-targets 0.52.6",
 ]
@@ -2080,7 +2080,7 @@ dependencies = [
  "phf_shared",
  "proc-macro2",
  "quote",
- "syn 2.0.76",
+ "syn 2.0.77",
 ]
 
 [[package]]
@@ -2109,7 +2109,7 @@ checksum = "2f38a4412a78282e09a2cf38d195ea5420d15ba0602cb375210efbc877243965"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.76",
+ "syn 2.0.77",
 ]
 
 [[package]]
@@ -2138,9 +2138,9 @@ dependencies = [
 
 [[package]]
 name = "plotters-backend"
-version = "0.3.6"
+version = "0.3.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "414cec62c6634ae900ea1c56128dfe87cf63e7caece0852ec76aba307cebadb7"
+checksum = "df42e13c12958a16b3f7f4386b9ab1f3e7933914ecea48da7139435263a4172a"
 
 [[package]]
 name = "png"
@@ -2198,7 +2198,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "479cf940fbbb3426c32c5d5176f62ad57549a0bb84773423ba8be9d089f5faba"
 dependencies = [
  "proc-macro2",
- "syn 2.0.76",
+ "syn 2.0.77",
 ]
 
 [[package]]
@@ -2246,7 +2246,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8021cf59c8ec9c432cfc2526ac6b8aa508ecaf29cd415f271b8406c1b851c3fd"
 dependencies = [
  "quote",
- "syn 2.0.76",
+ "syn 2.0.77",
 ]
 
 [[package]]
@@ -2266,9 +2266,9 @@ checksum = "a993555f31e5a609f617c12db6250dedcac1b0a85076912c436e6fc9b2c8e6a3"
 
 [[package]]
 name = "quick-xml"
-version = "0.34.0"
+version = "0.36.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6f24d770aeca0eacb81ac29dfbc55ebcc09312fdd1f8bbecdc7e4a84e000e3b4"
+checksum = "96a05e2e8efddfa51a84ca47cec303fac86c8541b686d37cac5efc0e094417bc"
 dependencies = [
  "memchr",
 ]
@@ -2301,7 +2301,7 @@ dependencies = [
  "proc-macro-utils",
  "proc-macro2",
  "quote",
- "syn 2.0.76",
+ "syn 2.0.77",
 ]
 
 [[package]]
@@ -2442,9 +2442,9 @@ dependencies = [
 
 [[package]]
 name = "redox_syscall"
-version = "0.5.3"
+version = "0.5.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2a908a6e00f1fdd0dfd9c0eb08ce85126f6d8bbda50017e74bc4a4b7d4a926a4"
+checksum = "0884ad60e090bf1345b93da0a5de8923c93884cd03f40dfcfddd3b4bee661853"
 dependencies = [
  "bitflags 2.6.0",
 ]
@@ -2501,9 +2501,9 @@ checksum = "19b30a45b0cd0bcca8037f3d0dc3421eaf95327a17cad11964fb8179b4fc4832"
 
 [[package]]
 name = "rgb"
-version = "0.8.48"
+version = "0.8.50"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0f86ae463694029097b846d8f99fd5536740602ae00022c0c50c5600720b2f71"
+checksum = "57397d16646700483b67d2dd6511d79318f9d057fdbd21a4066aeac8b41d310a"
 dependencies = [
  "bytemuck",
 ]
@@ -2528,9 +2528,9 @@ checksum = "08d43f7aa6b08d49f382cde6a7982047c3426db949b1424bc4b7ec9ae12c6ce2"
 
 [[package]]
 name = "rustix"
-version = "0.38.35"
+version = "0.38.37"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a85d50532239da68e9addb745ba38ff4612a242c1c7ceea689c4bc7c2f43c36f"
+checksum = "8acb788b847c24f28525660c4d7758620a7210875711f79e7f663cc152726811"
 dependencies = [
  "bitflags 2.6.0",
  "errno",
@@ -2613,7 +2613,7 @@ checksum = "243902eda00fad750862fc144cea25caca5e20d615af0a81bee94ca738f1df1f"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.76",
+ "syn 2.0.77",
 ]
 
 [[package]]
@@ -2795,9 +2795,9 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "2.0.76"
+version = "2.0.77"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "578e081a14e0cefc3279b0472138c513f37b41a08d5a3cca9b6e4e8ceb6cd525"
+checksum = "9f35bcdf61fd8e7be6caf75f429fdca8beb3ed76584befb503b1569faee373ed"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -2858,7 +2858,7 @@ checksum = "a4558b58466b9ad7ca0f102865eccc95938dca1a74a856f2b57b6629050da261"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.76",
+ "syn 2.0.77",
 ]
 
 [[package]]
@@ -2985,7 +2985,7 @@ checksum = "34704c8d6ebcbc939824180af020566b01a7c01f80641264eba0999f6c2b6be7"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.76",
+ "syn 2.0.77",
 ]
 
 [[package]]
@@ -3065,9 +3065,9 @@ checksum = "1df77b101bcc4ea3d78dafc5ad7e4f58ceffe0b2b16bf446aeb50b6cb4157656"
 
 [[package]]
 name = "unicode-ident"
-version = "1.0.12"
+version = "1.0.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3354b9ac3fae1ff6755cb6db53683adb661634f67557942dea4facebec0fee4b"
+checksum = "e91b56cd4cadaeb79bbf1a5645f6b4f8dc5bde8834ad5894a8db35fda9efa1fe"
 
 [[package]]
 name = "unicode-linebreak"
@@ -3172,7 +3172,7 @@ dependencies = [
  "once_cell",
  "proc-macro2",
  "quote",
- "syn 2.0.76",
+ "syn 2.0.77",
  "wasm-bindgen-shared",
 ]
 
@@ -3206,7 +3206,7 @@ checksum = "afc340c74d9005395cf9dd098506f7f44e38f2b4a21c6aaacf9a105ea5e1e836"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.76",
+ "syn 2.0.77",
  "wasm-bindgen-backend",
  "wasm-bindgen-shared",
 ]
@@ -3219,9 +3219,9 @@ checksum = "c62a0a307cb4a311d3a07867860911ca130c3494e8c2719593806c08bc5d0484"
 
 [[package]]
 name = "wayland-backend"
-version = "0.3.6"
+version = "0.3.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f90e11ce2ca99c97b940ee83edbae9da2d56a08f9ea8158550fd77fa31722993"
+checksum = "056535ced7a150d45159d3a8dc30f91a2e2d588ca0b23f70e56033622b8016f6"
 dependencies = [
  "cc",
  "downcast-rs",
@@ -3233,9 +3233,9 @@ dependencies = [
 
 [[package]]
 name = "wayland-client"
-version = "0.31.5"
+version = "0.31.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7e321577a0a165911bdcfb39cf029302479d7527b517ee58ab0f6ad09edf0943"
+checksum = "e3f45d1222915ef1fd2057220c1d9d9624b7654443ea35c3877f7a52bd0a5a2d"
 dependencies = [
  "bitflags 2.6.0",
  "rustix",
@@ -3256,9 +3256,9 @@ dependencies = [
 
 [[package]]
 name = "wayland-cursor"
-version = "0.31.5"
+version = "0.31.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6ef9489a8df197ebf3a8ce8a7a7f0a2320035c3743f3c1bd0bdbccf07ce64f95"
+checksum = "3a94697e66e76c85923b0d28a0c251e8f0666f58fc47d316c0f4da6da75d37cb"
 dependencies = [
  "rustix",
  "wayland-client",
@@ -3267,9 +3267,9 @@ dependencies = [
 
 [[package]]
 name = "wayland-protocols"
-version = "0.32.3"
+version = "0.32.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "62989625a776e827cc0f15d41444a3cea5205b963c3a25be48ae1b52d6b4daaa"
+checksum = "2b5755d77ae9040bb872a25026555ce4cb0ae75fd923e90d25fba07d81057de0"
 dependencies = [
  "bitflags 2.6.0",
  "wayland-backend",
@@ -3279,9 +3279,9 @@ dependencies = [
 
 [[package]]
 name = "wayland-protocols-plasma"
-version = "0.3.3"
+version = "0.3.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f79f2d57c7fcc6ab4d602adba364bf59a5c24de57bd194486bf9b8360e06bfc4"
+checksum = "8a0a41a6875e585172495f7a96dfa42ca7e0213868f4f15c313f7c33221a7eff"
 dependencies = [
  "bitflags 2.6.0",
  "wayland-backend",
@@ -3292,9 +3292,9 @@ dependencies = [
 
 [[package]]
 name = "wayland-protocols-wlr"
-version = "0.3.3"
+version = "0.3.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fd993de54a40a40fbe5601d9f1fbcaef0aebcc5fda447d7dc8f6dcbaae4f8953"
+checksum = "dad87b5fd1b1d3ca2f792df8f686a2a11e3fe1077b71096f7a175ab699f89109"
 dependencies = [
  "bitflags 2.6.0",
  "wayland-backend",
@@ -3305,9 +3305,9 @@ dependencies = [
 
 [[package]]
 name = "wayland-scanner"
-version = "0.31.4"
+version = "0.31.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d7b56f89937f1cf2ee1f1259cf2936a17a1f45d8f0aa1019fae6d470d304cfa6"
+checksum = "597f2001b2e5fc1121e3d5b9791d3e78f05ba6bfa4641053846248e3a13661c3"
 dependencies = [
  "proc-macro2",
  "quick-xml",
@@ -3316,9 +3316,9 @@ dependencies = [
 
 [[package]]
 name = "wayland-sys"
-version = "0.31.4"
+version = "0.31.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "43676fe2daf68754ecf1d72026e4e6c15483198b5d24e888b74d3f22f887a148"
+checksum = "efa8ac0d8e8ed3e3b5c9fc92c7881406a268e11555abe36493efabe649a29e09"
 dependencies = [
  "dlib",
  "log",
@@ -3848,9 +3848,9 @@ checksum = "b9cc00251562a284751c9973bace760d86c0276c471b4be569fe6b068ee97a56"
 
 [[package]]
 name = "xml-rs"
-version = "0.8.21"
+version = "0.8.22"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "539a77ee7c0de333dcc6da69b177380a0b81e0dacfa4f7344c465a36871ee601"
+checksum = "af4e2e2f7cba5a093896c1e150fbfe177d1883e7448200efb81d40b9d339ef26"
 
 [[package]]
 name = "yazi"
@@ -3882,7 +3882,7 @@ checksum = "fa4f8080344d4671fb4e831a13ad1e68092748387dfc4f55e356242fae12ce3e"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.76",
+ "syn 2.0.77",
 ]
 
 [[package]]
diff --git a/src/window.rs b/src/window.rs
index 1bb5601..3678533 100644
--- a/src/window.rs
+++ b/src/window.rs
@@ -39,7 +39,7 @@ use kludgine::shapes::Shape;
 use kludgine::wgpu::{self, CompositeAlphaMode, COPY_BYTES_PER_ROW_ALIGNMENT};
 use kludgine::{Color, DrawableExt, Kludgine, KludgineId, Origin, Texture};
 use parking_lot::{Mutex, MutexGuard};
-use sealed::Ize;
+use sealed::{Ize, WindowExecute};
 use tracing::Level;
 use unicode_segmentation::UnicodeSegmentation;
 
@@ -2652,6 +2652,30 @@ where
                     window.winit().set_maximized(maximize);
                 }
             }
+            WindowCommand::Execute(func) => {
+                let mut window = RunningWindow::new(
+                    window,
+                    kludgine.id(),
+                    &self.redraw_status,
+                    &self.cushy,
+                    &self.focused,
+                    &self.occluded,
+                    self.inner_size.source(),
+                    &self.close_requested,
+                );
+                let mut context = EventContext::new(
+                    WidgetContext::new(
+                        self.root.clone(),
+                        &self.current_theme,
+                        &mut window,
+                        &mut self.fonts,
+                        self.theme_mode.get(),
+                        &mut self.cursor,
+                    ),
+                    kludgine,
+                );
+                func.execute(&mut context);
+            }
         }
     }
 
@@ -2722,6 +2746,7 @@ pub(crate) struct CursorState {
 
 pub(crate) mod sealed {
     use std::cell::RefCell;
+    use std::fmt::Debug;
     use std::num::NonZeroU32;
 
     use figures::units::{Px, UPx};
@@ -2734,6 +2759,7 @@ pub(crate) mod sealed {
     use super::{PendingWindow, WindowHandle};
     use crate::app::Cushy;
     use crate::context::sealed::InvalidationStatus;
+    use crate::context::EventContext;
     use crate::fonts::FontCollection;
     use crate::styles::{FontFamilyList, ThemePair};
     use crate::value::{Dynamic, Value};
@@ -2790,7 +2816,42 @@ pub(crate) mod sealed {
         pub fullscreen: Value<Option<Fullscreen>>,
     }
 
-    #[derive(Debug, Clone)]
+    pub struct WindowExecute(Box<dyn ExecuteFunc>);
+
+    impl WindowExecute {
+        pub fn new<F>(func: F) -> Self
+        where
+            F: FnOnce(&mut EventContext<'_>) + Send + 'static,
+        {
+            Self(Box::new(Some(func)))
+        }
+
+        pub fn execute(mut self, context: &mut EventContext<'_>) {
+            self.0.execute(context);
+        }
+    }
+
+    impl Debug for WindowExecute {
+        fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+            f.debug_struct("WindowExecute").finish_non_exhaustive()
+        }
+    }
+
+    pub trait ExecuteFunc: Send + 'static {
+        fn execute(&mut self, context: &mut EventContext<'_>);
+    }
+
+    impl<F> ExecuteFunc for Option<F>
+    where
+        F: FnOnce(&mut EventContext<'_>) + Send + 'static,
+    {
+        fn execute(&mut self, context: &mut EventContext<'_>) {
+            let func = self.take().expect("not executed");
+            func(context);
+        }
+    }
+
+    #[derive(Debug)]
     pub enum WindowCommand {
         Redraw,
         Sync,
@@ -2800,6 +2861,7 @@ pub(crate) mod sealed {
         Focus,
         Ize(Option<Ize>),
         SetTitle(String),
+        Execute(WindowExecute),
     }
 
     #[derive(Debug, Clone)]
@@ -2967,6 +3029,15 @@ impl WindowHandle {
             self.redraw();
         }
     }
+
+    /// Executes `func` on the window thread.
+    pub fn execute<F>(&self, func: F)
+    where
+        F: FnOnce(&mut EventContext<'_>) + Send + 'static,
+    {
+        self.inner
+            .send(WindowCommand::Execute(WindowExecute::new(func)));
+    }
 }
 
 impl Eq for WindowHandle {}
@@ -3007,6 +3078,9 @@ impl InnerWindowHandle {
                 WindowCommand::Redraw => state.redraw_target.set(RedrawTarget::Now),
                 WindowCommand::RequestClose => state.close_requested.set(true),
                 WindowCommand::SetTitle(title) => state.title.set(title),
+                WindowCommand::Execute(_func) => {
+                    tracing::error!("ignoring execution of window function on virtual window");
+                }
                 WindowCommand::ResetDeadKeys
                 | WindowCommand::RequestUserAttention(_)
                 | WindowCommand::Focus